An ultrasonic cleaner can loosen stubborn deposits and reach places that would be impossible to reach when cleaning the windings by hand.Īnother–and probably the best–method for cleaning the windings is using a stator burnout oven.

One method is using an ultrasonic cleaner. There are better methods for properly cleaning the stator core that are perfectly safe for the windings. Chemical-based cleaners and a lot of scrubbing can work, but it takes a lot of time and may even damage the windings. The Method Used to Clean the Stator CoreĬleaning the stator core can be a harsh, labor intensive process without the right equipment.

For these reasons your motor rewind shop should have a climate-controlled clean area dedicated to the motor rewinding process. In addition, condensation generated by rapidly changing temperatures can also have a negative impact on the quality of the rewinding process.

These particles can contaminate the rewinding process. Here are some of the things you should think about when selecting a service provider.Īn electric motor rewind is a delicate process, and removing the dirt, old insulation and grime accumulated after years of use within a motor is a difficult dirty practice (in most cases). But superior results depend on several factors that you might not have considered when seeking out an electric motor rewinding shop. Decreased insulation resistance may lead to a layer short-circuit or other short-circuit faults.4 Little-Known Factors That Impact the Quality of Your Electric Motor RewindĪ superior electric motor rewinding service can make your existing motor run as good as–and sometimes even better than–new. The insulation resistance of coils decreases due to the adhesion of dust, oil, and chemicals as well as condensation and moisture absorption. In addition, a damaged bearing causes the stator and rotor cores to rub against each other, eventually leading to coil burnout.

Vibration, heat, and inadequate lubrication reduce the lifetime of the bearing. The vibration of the motor itself and external vibration cause wear and bending strain, degrading its mechanical strength. Repeated start-ups accelerate fatigue in the insulating layer, which sometimes results in insulation deterioration in a short period of time. The electromagnetic force produced by a large starting current causes the vibration of the stator coil. A long period of operation and repeated start-stop cycles cause the coil insulation to deteriorate due to heat, reducing its mechanical and dielectric strengths.Įlectric motors are exposed to a starting current that is five to seven times as large as the rated current.

Electric motor winding repair